Stone crusher



Feb. 6, 1934. I c. A. GUSTAFSON 1,945,853

STONE CRUSHER Filed Feb. 6, 1929 s Sheets-Sheet 1 .772 V67ZZ0Z4 CARL ,4. 6057A FJON ATTOENEYS F/cs. 4

Feb. 6, 1934. c. A. GUSTAFSON 1,945,853

STONE CRUSHER Filed Feb. 1 1929 3 Sheets-Sheet 2 [n Vania) CARL A. GZASTA FJON ATTOk/ EKJ' Feb. 6, 1934. c. A. GUISTAFSON STONE CRUSHER Filed Feb. 16

3 Sheets-Sheet 3 8 I. 5 I 9 3 z @3 a l I. |lll W MI l 1 MH' g 2 3 M ,3, l0

Patented Feb. 6, 1934 UNITED STATES PATENT OFFICE STONE CRUSHER lvlinnesota Application February 16, 1929. Serial No. 340,423

14 Claims.

This invention relates to new and useful improvements in stone crushers, and an object of the invention is to provide improved means for adjusting the movable blade thereof, comprising oppositely movable wedge members mounted in suitable guides engaged with a thrust member operatively connected with the movable jaw whereby, when the wedge members are relatively moved in their guides, the movable jaw may be moved in a direction towards or away from the fixed jaw, said wedge members being movable by a single threaded shaft.

A further object is to provide a stone crusher comprising a pair of jaws, one of which is movably ,mounted and having a connection with a pair of wedge members mounted in substantially semicylindrical seats provided in the crusher frame and so arranged that they may be accurately machined in substantially parallel relation to the axis of the eccentric shaft, connected with the movable jaw, and the means associated with said wedge members and cooperating therewith to adjust the movable jaw relatively to the fixed jaw, being so constructed and organized as to permit the rear portion of the crusher frame to be adequately braced and strengthened, thereby minimizing the danger of damaging or breaking the crusher frame, when the crusher is subjected to heavy duty work.

The primary object of the invention, therefore, is to provide an improved stone crusher having its frame and associated parts designed in a manner to permit reinforcing and strengthening of the parts is facilitated.

Other objects of the invention will appear from the following description and accompanying drawings and will be pointed out in the annexed claims.

In the accompanying drawings, there has been disclosed a structure designed to carry out the various objects of the invention, but it is to be understood that the invention is not confined to the exact features shown as various changes may ,be made within the scope of the claims which follow.

In the accompanying drawings forming part of this specification;

Figure 1 is a vertical sectional view on the line 1--1 of Figure 3; with the balance wheels omitted;

Figure2 is a crosssectional view on the line 2-.2 of Figure 1;

55 Figure 3 is a sectional plan view on the line 33 of Figure 1, showing the wedge members and having side walls 22 provided with suitable legs t 3 adapted to, be secured to a suitable base or support, not shown.

An eccentric shaft 4, having reduced end portions 5, is mounted in suitable anti-friction bearings 6 retained in split boxes '7, provided uponthe 7-0 side walls 2-2 of the main frame, as best shown in. Figure 2. A pitman 8, having a jaw 9 demountably secured thereto by suitable, fastening elements 11 and bolts 12, is provided at its upper end with a bore 13, traversed by the eccentric,"

shaft 4. Suitable anti-friction bearings 14 are mounted on seats 15 provided on the eccentric shaft 4, and support the upper end of the pitman 8, upon the shaft, as particularly shown in Figure 2. Suitable balance wheels 16 aresecuredto, the reduced end portions 5 of the eccentric shaft l.

A relatively fixed jaw 17 is secured to the .end wall 10 of the crusher frame by suitable wedge elements 18 and plates'19, secured to theside walls, 2 of the frame, by bolts 22 and 23, respectively, as shown in Figure 1. The bolts 22 pass through slots '24 provided in the wedge elements 18, sofas to permit up and down adjustment of theelements to rigidly. secure the jaw 17 to the end wall 10 of the frame.

The lower end of the pitman 8 is supported' .by a strut 26, having its opposite edges rounded as shown in Figure 1. One edge of said strut is adapted to be received in an elongated seat 27, demountably secured to the lower end of, the pitman 8, and the other rounded edge of said-strut is selectively positioned in one ,orthe other of}. pair of grooves 25, provided in a memberj28 secured to a thrust member or block 29, by means of 9 lugs 31 and pins 32, as shown. The strut-26,,is held against longitudinal movement by a 111.929, provided in the seat member27, andreceivod a notch 21 in the adjacent edge of the strut, as shown in Figure 3. The front wall. of the member 29 is provided with suitableapertures 33 adapted to receive the lugs 31 of thethrust member-29.

An important feature of the invention resides in the means provided for relatively adjusting'the :19

lower end of the pitman 8 to increase or decrease the gap or space between the lower portions of the. jaws 9 and 1'7, to regulate the degree of fineness of the crushed material. 7

Such means consists of a pair of oppositely disposed wedge members 34, each having an inclined face 35 adapted to engage a correspondingly shaped face 36 provided at each end of the thrust member 29. Each wedge member further has a semi-cylindrical bearing surface 37, adapted to engage a correspondingly shaped seat or surface.

38 provided in the rear wall 39 of the crusher frame. Suitable apertures 41 are provided in the side walls 2-2 of the frameadjacent to the rear wall 39, and the bearing surfaces 38 extend through these apertures to the exterior of the machine frame, as best shown in Figure 3.

The wedge members 34 are movable towards and away from each other by means of a shaft 42,

provided at one end with a right hand thread, and at its other end with a lefthand thread, as shown in Figure 3. These threaded shaft portions are received in correspondingly threaded nuts 44, mounted in recesses 45 provided in the wedge members 34. 7

The shaft 42 is rotatably mounted in suitable bearings secured to the outer portions of the bearing surfaces 38, provided in the rear wall 39 .of the main frame. 30 A reduced end portion 47 is provided ateach end of the shaft 42, and each has a wheel-like member 48 suitably secured thereto. A plurality of sockets 49 are formed in the peripheries of the wheel-like members 48 adapted to receive a crank 51 for rotating the shaft 42. When the shaft is rotated in one direction, the wedge members 34 will be moved outwardly in a direction away from each other, thereby permitting the thrust member 29 to be moved rearwardiy by the action of a spring 52, coiled about a rod 53 having one end pivotally connected with the lower end of the pitman 8, and its other end passing through a guide block 5.4"engaged with a lug v55 depending from the rear wall 39' of the frame. A suitabie cup" shaped washer 56 is engaged with'the outer end of the spring 52 and with the hub of a hand wheel 5'7, received in threaded engagement with the outer end of the rod 53. The spring 52 constantly tends to pull the lower end of thepitman 3 in a direction towards the thrust member 29, thereby preventing the strut 26 from accidentally becoming disengaged from the members 27 and 28.

The construction and arrangement of v the wedge members 34, the thrust member 29, and the shaft 42, forms an important part of app1icants invention in that it permits these parts to be readily assembled in the crusher frame without removing .it from its base, and it also allowsrreinforcing the rear portion of the frame, as evi- 60 denced by the webs or flanges 58, provided at the lower rear portion of the frame and upon which the thrust member 29 is movably supported. These webs 58 provide in effect, gusset plates connecting the rear wall 39 with the side walls 22 of the crusher frame. Finishing strips 61 are provided upon the inner surfaces of the side walls 22 adapted to be engaged by the ends of the thrust member 29 to limit longitudinal movement thereof. 79' The wedge members 34 are operable simultaneously, in opposite directions, by rotation of the shaft 42, and are substantially self-alining when engaged with the thrust member 29. This will readily be seen by reference to Figure 3, wherein it will be noted that the inclined faces 35,

when engaged with their complemental faces 36, provided in the thrust member 29, will cause the wedge members 34 to automatically aline themselves with the thrust member, thereby eliminating unnecessary strains from the main frame.

The main frame of the crusher above described, readily lends itself to machining, in that the semi-cylindrical bearing surfaces 38, against which the wedge members 34 are seated, may readily be machined by a turning operation, as indicated by the broken line 62 in Figure 4. These-bearing surfaces extend to the exterior of the main frame so that an ordinary boring bar may be inserted through the apertures 41, and the surfaces 38 machined in the usual wellknown manner. t is also to be understood that the surfaces 38 are substantially parallel to the axis of the eccentric shaft 4, and because of such parallel relation, the splitbearing boxes '7 and the bearing surfaces 38 may be readily machined without disturbing the setting of the main frame upon the bed of a suitable boring mill, such as may be used in the operation of machining the crusher frame. The wedge members 34 are readily removable from the main frame by detaching the brackets 40 from the rear wall 39, and removing the wheel-like members 48 from the shaft 42, after which the parts connected with the shaft 42 may be withdrawn from the main frame through the openings 41, provided in the side walls 2-2 thereof. The thrust member 29 may readilyberemoved through the top of the main frame by detaching the cover plate 63, andthe brackets 64 bolted to the side walls 2-2. These brackets function to hold the thrust member 29 in proper position within the main frame. The reinforcing webs or flanges 58 provided in the lower portion of the main frame greatly strengthen the rear corners of the frame, and minimize the possibility of the frame becoming fractured or broken at these points, when subjected to heavy duty work.

I claim as my invention:

1. In an apparatus of the class described, the combination of a frame, an eccentric shaft mounted thereon, a pitman connected at one end with said shaft, a jaw secured to said pitman and movable therewith, a jaw fixedly mounted in said frame, a thrust member slidably mounted in said frame, a strut operatively connecting the lower end of said pitman with said thrust member, oppositely arranged inclined faces on said thrust member, wedge members engaged with said inclined faces, a shaft traversing said wedge members and having portions thereof threaded, a nut looselyand non-rotatably'mounted in each wedge member and received in threaded engagement with said shaft, and means for rotating said shaft, whereby said wedge members will be simultaneously moved in opposite directions to translate said thrust member and cause said movable jaw to be adjusted with re-; spect to said fixed jaw. r

2. In an apparatus of the class described, the

combination of a frame, an eccentric shaft mounted thereon, a pitman connected at one end with said shaft, a jaw secured to said pitman and movable therewith, a jaw fixedly mounted in said frame, a thrust member slidably mounted in said frame, a strut operatively connecting the lower end of said pitman with said thrust member, oppositely arranged inclined faces on said thrust member, said frame having alined, apertures in the side wallsthereof each having e concaved seat therein, wedge members slidable in said concaved seats and engaged with said inclined faces, a shaft traversing said wedge members and said apertures and having portions thereof threaded, a nut immovably mounted in each wedge member and received in threaded engagement with said shaft, and means for rotating said shaft, whereby said wedge members will be simultaneously moved in opposite directions to translate said thrust member and cause said movable jaw to be adjusted relatively to said fixed aw.

3. A crusher comprising a frame, a plurality of jaws, one of said jaws being movable relatively to the other to crush materials therebetween, a driving shaft, self-aligning bearings mounting the shaft in the frame, an eccentric on the shaft, and a self-aligning bearing surrounding the eccentric and supporting the said movable jaw.

4. A crusher comprising a frame, a plurality of jaws, one of said jaws being movable relatively to the other to crush materials therebetween, a driving shaft, self-aligning anti-friction bearings mounting the shaft in the frame, eccentrics on the shaft, and self-aligning anti-friction bearings surrounding the eccentrics and supporting the said movable jaw.

5. A crusher comprising a frame, a plurality of jaws, one of said jaws being movable relatively to the other to crush materials therebetween, a driving shaft, self-aligning bearings mounting the shaft in the frame, eccentrics on the shaft, self-aligning bearings surrounding the eccentrics and supporting the upper end of the movable jav, and means for guiding the lower end of the movable jaw.

6. A crusher comprising a frame, a plurality of jaws, one of said jaws being movable relatively to the other to crush materials therebetween, a driving shaft, self-aligning anti-friction bearings mounting the shaft in the frame, eccentrics on the shaft, self-aligning anti-friction bearings surrounding the eccentrics and supporting the upper end of the movable jaw, and means for guiding the lower end of the movable jaw.

7. A crusher comprising a frame, a plurality of jaws, one of said jaws being movable relatively to the other to crush materials therebetween, a driving shaft, self-aligning bearings mounting the shaft in the frame, eccentrics on the shaft, selfaligning bearings surrounding the eccentrics and supporting the upper end of the movable jaw, and means for guiding the lower end of the movable jaw in an arc.

8. A crusher comprising a frame, a plurality of jaws, one of said jaws being movable relatively to the other to crush materials therebetween, a driving shaft, self -aligning bearings mounting the shaft in the frame, eccentrics on the shaft, selfaligning bearings surrounding the eccentrics and supporting the upper end of the movable jaw, and adjustable means for guiding the lower end of the movable jaw.

9. A crusher comprising a frame, a plurality of jaws, one of said jaws being movable relatively to the other to crush materials therebetween, a driving shaft, bearings mounting the shaft in the frame, eccentrics on the shaft, and bearings surrounding the eccentrics and communicating with a lubricant chamber in the movable jaw.

10. A crusher comprising a frame, a plurality of jaws, one of said jaws being movable relatively to the other to crush materialstherebetween, a driving shaft, bearings mounting the shaft in the frame, eccentrics on the shaft, and anti-friction bearings surrounding the eccentrics and communicating with a lubricant chamber in the movable jaw.

11. A crusher comprising a frame, a plurality of jaws, one of said jaws being movable relatively to the other to crush materials therebetween, a driving shaft, self-aligning bearings mounting the shaft in the frame, eccentrics on the shaft, and self-aligning bearings surrounding the eccentrics and communicating with a lubricant chamber in the movable jaw.

12. A crusher comprising a frame, a plurality of jaws, one of said jaws being movable relatively to the other to crush materials therebetween, a driving shaft, self-aligning anti-friction bearings mounting the shaft in the frame, eccentrics on the shaft, and self-aligning antifriction bearings surrounding the eccentrics and communicating with a lubricant chamber in the movable jaw.

13. A crusher comprising a frame having side plates, a plurality of jaws, one of said jaws being movable relatively to the other to crush materials therebetween, a driving shaft, bearings mounting the shaft in the frame, said bearings being located in openings in the side plates whereby the plates receive directly stresses on the bearings, eccentrics on the shaft, and bearings surrounding the eccentrics and located within a lubricant chamber in the movable jaw.

14. A crusher comprising a frame having side plates, a plurality of jaws, one of said jaws being movable relatively to the other to crush materials therebetween, a driving shaft, bearings mounting the shaft in the frame, said self-aligning bearings being located in openings in the side plates whereby the plates receive directly stresses on the bearings, eccentrics on the shaft, andself-aligning bearings surrounding the eccentrics and located within a lubricant chamber in the movable jaw.

CARL A. GUSTAFSON. 

